Sorry but I do not have all the info that you have asked for. However, these caliper brackets are designed to fit the early RZ350 fork sliders up until around 1985-86. The hole centres on the fork sliders are 42mm apart. Around 1986 I believe that the fork sliders, calipers and caliper adaptors were changed and the hole centres are much further apart, the lower hole being much closer to the axle than the early type. The adaptors that I make are for the early type sliders with 42mm hole centres. As far as I am aware, people who have done the Blue Spot/R1, R6 disc modification have continued to use the stock master cylinder.

Unfortunately the photographs attached to the opening of this posting are no longer able to be viewed without me parting with a lot of money to the company that hosts those photos. However, if you wish to view them in order to see whether the caliper adaptors will fit your model RZ350, email me at normsurg@tpg.com.au and I will gladly send you photos FREE !

I have a set of Norm's calliper adapters, Blue Spots with early R1 discs on my rd350lc,this bike has later model rz350ypvs wheels fitted.I'm using a Mikes XS 1/2" master cylinder on that and it's got a good feel and works well.

I also have upgraded my 1989 model FJ1200 to Blue Spots and the std master cylinder on that is5/8" and that feels wooden and very little lever travel.

I have seen else where that an r6 master cylinder is 14mm bore(but don't quote me on that!).

I did the R1 calipers on my 84RZ . I ran the stock master cylinder with stainless lines and thought the brakes felt a little wooden. I switched to a FZ1 master cylinder ( mainly because it looked stock and I could still mount the mirror on it ) and it made it feel a lot stronger. It was what I was looking for. I used a 2003 model m/c.

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